[M2.82L]                                                              [M2.82]								82
                                                                      
                                                                      		b c is at the true maximum width of enclosed foliating
                                                                      		space in cusp of small arch:  the cusp of the trefoil
                                                                      		in the round is about twice as deep (a is same line in all
                                                                      		these sections)
                                                                      		C. Through great roll and cusp of central or lateral 4 foil
                                                                      		only lateral have no outer fillet, take the dotted line
                                                                      		and in central;  at the between the cusps x y is slurred into x2
                                                                      		D. through cusp of great circular 4 foils;  the dotted
                                                                      		line being section between cusps.  F. through upper triangle
                                                                      		and G. on the {abacus of} pendant of small sub arches.
                                                                      		The expedient employed in the altered section C. by
                                                                      		missing the cavetto and smaller roll, and thus enormously
                                                                      		deepening the cusp, to get greater space for foliation is
                                                                      		to be carefully noted:  Again in G. note that - all being
                                                                      		to same scale, m,n is double of m2 n2 in B.  Why this is,
                                                                      		will be seen in the very careful profile of the entire 
                                                                      		cusp of sub arch at F. H. which shows also the same law
                                                                      		observed in the circle above:  and the neat adjustment
                                                                      		of that circle exactly to the apex of pointed arch;  the
                                                                      		junction is clearer at K.
                                                                      		It is evident that in this tracery there is no thought of
                                                                      		a continuous series of 4 foils cut off.  It is complete
                                                                      		in itself like the traceries of the North.
                                                                      		But by far the most curious Frari tracery is that on No
                                                                      		150 - it is one of the pairs of arches which cross the
                                                                      		windows of the small

[Version 0.05: May 2008]